docs: refresh CLAUDE.md to current repo state

[seonghobae]

Summary

Refreshes the existing CLAUDE.md so it matches the repository's current state (document remains in Korean, original structure preserved):

• Replaced the stale packages/ai entry with packages/cli (npm package argos-ai) and documented the pnpm workspace + Turborepo layout.
• Updated the commands section to the now-existing typecheck/lint package scripts plus root turbo commands.
• Added verified key files (rbac.ts, db.ts, vercel.json) and corrected the migration-deploy note (prisma migrate deploy runs only when VERCEL_ENV=production).
• Added a section pointing to the repo's own .claude/skills and .claude/agents.
• Prepended the standard CLAUDE.md header; kept the unchanged production 500-error protocol and API error-shape sections.

All referenced file paths (auth-actions.ts, error-helper.ts with jsonError/handleRouteError, jwt.ts, schema.prisma) were verified to exist.

🤖 Generated with Claude Code

https://claude.ai/code/session_019zWjgFjCupJNvARzcFETtR

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